(Short story, then my issue) I wouldn't consider myself experienced or new at keeping chickens. I adopted four about 2-3 year old girls with a coop (got them about 3 years ago). Last spring I was offered more hens and said I would take six. When I went to take delivery, only 1 was a hen so I took her. We watched TV and cuddled for months, she was so sweet. I know not to introduce a chick a couple months old to what I had so she stayed inside with me until ready. I then sectioned off part of the run so they were separate but could see and talk and get used to each other. I then let them get together and all was great for a few months. It got hot in South Central Alabama and all the girls quit laying except one of the older ones (the youngest hadn't started yet). I went to tuck them into bed and only Ginger (Welsummer) the one layer was in the coop. After days of searching, I couldn't find the other girls, no blood, feathers, nothing. More research showed it must be human intervention. I went a month or two with the one girl that was saved because she was in a nesting box knowing it was going to get cold in a few months and she needed a flock to keep each other warm. The timing happened and I got 6 ISA Brown, 6 Leghorn. Again, I knew not to introduce them to early because of sizes and numbers. Tip, don't raise 12 chicks in your house for a few months to get their size right to go outside. They can fly in DAYS! Anyway, I put those twelve 4 month olds in with the 5-6ish year old and they were great together until the young ones started laying! Now the pecking order is being changed and the elder is losing! There is a fair amount of feather pecking going on and I have applied Tractor Supply Company purple stuff on the victims which is reducing the pecking. But today something new has come up. Yesterday I spent hours in the yard petting them and didn't notice anything wrong. A friend came over and said something like 'you know you have a growth on one of your chickens?'. I said no because I was with them a long time yesterday. I admit, could have missed her having that many chickens but I received my ankle tags to identify them so they will be easily identified now. So, to my point. My friend said it looked like 'Strangles' like in horses. I looked that up and don't agree. The only picture I have found that looks like my girl has a picture online that looks like Bird Flu. I contacted a local vet and he said no, its not it. She isn't showing any symptoms but was wondering if I post a few pictures if anyone has had similar experience.